Cooper Bussmann BP/SC-20 Type SC Class G Cartridge Fuse, 20 Amp, 2-PackCompact branch circuit units with high interrupting rating and current limitation. With upto a 600V rating, they can be used in 120 208V, 120 240V and 277 480V circuits. Size rejection by length helps prevent over fusing. In general, SC fuses are about 12 the size of the 600V NEC fuse type. SC fuses 7amps and above have a degree of overload time delay which permits them to pass temporary overloads. 2 pack 20 amps 300 volts 13 32" diameter Time lag